MOISBASS

Offentlig prosjektsammendrag

Dry pelleted diets have many advantages over wet diets including an ease of quality management and simple transport and storage. In addition, dry diets are better suited for use with automatic feeders and are generally more stable in water, causing less pollution. The intake of water is essential for all aquatic animals. This requirement can be met either by the direct intake of water or by chemical reactions in the body. Dietary water, which is usually noted as “other dietary components” may require more attention as it can influence the digestive process and uptake of the dietary nutrients. Many studies have shown an improvement in growth and nutrient retention attributable to a faster nutrient release from the stomach and increased digestibility. Gastric evacuation rate (GER) is affected by various factor, including water temperature, fish size, diet composition and meal size. Information on the GER of fish is useful to assess appetite return and allow an estimate of the proper feeding regime. The optimum feeding rates not only enhance the growth, survival and FCR, but also assist the minimization of food wastage, size variation and ultimate production costs.